Chair-seat-surfacing machine.



No. 714,529. Patented Nov. 25;,1902

4 c. A. STARK.

CHAIR SEAT SUBIFAGING MACHINE.

(Application filed Aug. 9, 1909.)

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TIE SEES- N0. 7l4, 529. Patented Nov. 25, I902..

-c.f'A. STARK. mum SEAT SUBEAGINB MACHINE. (Application filed Aug. 9,1902.)

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, ATE FIGEo CHARLES A. STARK, OF UNION CITY, PENNSYLVANIA.

CHAlR-SEAT-SURFACING MACHINE.

SPF-GIFIGATION fOrming' part Of Letters Patent No. 714,529, datedNovember 25, 1902.

Application filed August 9. 1902. Serial No. 118,997. (No model.)

To all whom, it may concern:

Be it known that 1, CHARLES A. STARK, a citizen of the United States,residing at Union City, in the county of Erie and State of Pennsylvania,have invented certain new and useful Improvements inOhair-Seat-Surfacing Machines; andldo hereby declare the following to bea full, clear, and exact description of the invention, such as willenable others skilled in theart to which it appertains to make and usethe same, reference beinghad to the accompanying drawings, and to theletters of reference marked thereon, forming part of this specification.

My invention relates to improvements in.

chair-seat-surfacing machines, and has for its object the production ofa machine wherewith a saddle-seat surface can be produced in achair-seatat a single operation. I accomplish this result by constructing mymachine with a reciprocally traveling bed to which a chair-seat can beclamped and by providing a rotary cutter-cylinder mounted on a 'swingingyoke, the supporting-frame of which is adapted to be raised and loweredas the chair-seat travels under the cutter-cylinder, the movements ofsaid swinging yoke and of the said supporting-frame being controlled bymeans of cam mechanism so as to produce the desired result.

These and other features of my invention are hereinafter set forth anddescribed, and illustrated in the accompanying drawings, in which-Figure 1 is a side view in elevation of my improved chair-seat-surfacingmachine. Fig. 2 is an end view of the same. Fig. 3 is a top or plan viewof the same.

In the drawings illustrating my invention, A is the frame of themachine, and in the top of this frame there is a sliding table B,provided on its under surface with a rack 12, with which a gear-wheel O,mounted on the shaft 0, intermeshes. The gear-wheel shaft 0 is mountedin the frame A and is provided with a hand-wheel C" at one side of theframe for operating it. On the top of the table B, I provide clamping.mechanism D D d for securing a chair-seat E thereon.

At the sides of one end of the frame A, I pivot arms F on pivots j,which extend toward the central part of the machine, where they aresecured to a yoke F,so that the arms F and the yoke-frame F aresubstantially an integral structure swinging up and down freely upon thepivots ff. Through the center of the machine-frame A there is a shaft G,provided with cams G at each side of the frame. This shaft G is rotatedby means of .a gear-wheel c on the hand-whee1 shaft 0, an intermediategear-wheel c, and a gear-wheel g on the shaft G, so that the rotation ofthe shaft G and the cams G thereon are in unison with the travel of thetable B. On one end of the shaft G there is also another cam G, as andfor the purpose hereinafter set forth.

Upon the yoke-frame F there are frictionrollers f f, which rest upon thecams G and support the yoke-frame, which as the cams rotate raise andlower the yoke-frame.

Upon the yoke-frame F, I mount a yoke H by means of a pivot H, whichpasses through the yoke-frame F and the yoke H at one side of the centerof the yoke and yoke-frame, as is clearly shown in Figs. 2 and 3. Inthis yoke I mount a cutter-cylinder I in boxes 2' 'i on said yoke. Theedges of the blades I of the cutter-cylinder I are made irregular inshape, as illustrated in Fig. 2, to conform to the portion of thechair-seat E to be hollowed out. The cutter-cylinder I is also'providedwith a belt-pulley I for the reception of a driving-belt J. On one endof the yoke H there is an arm H provided with a frictionroller h, whichcontacts with the cam G on the shaft G, as illustrated in Fig. 1, whichcam, operating therethrough upon the yoke H, rocks the yoke H and thecutter-cylinder I, carried thereby, upon the yoke-frame F, asillustrated in Fig. 2.

In operation when a chair-seat E is secured upon the table B and ismoved underthe cuttor-cylinder I the cams G operate to lower theyoke-frame F, the yoke H, and the cutter-cylinder, so as to cut thesurface of the seat away at E, as shown in Figs. l and 3, until nearlythe center of the seat is reached, when the cam G acting upon the yokeH, raises one end of it, together with one end of the cutter-cylindermounted therein, so as to form the central ridge e at the front of theseat, as illustrated in dotted lines in Fig. 1, and as the roller itpasses 0E of the point of the cam G the end of the yoke andcuttercylinder carried thereby move down again, so as to cut theremainder of the surface of the chair-seat E in the same form as thatpart designated by E.

Having thus described my invention so as to enable others to constructand utilize the same, What I claim as new, and desire to se-' cure byLetters Patent of the United States, 1s

1. The combination in a chair-seat-surfacing machine, ofa frame, asliding table mounted thereon, a yoke-frame above said sliding table,means for automatically raising and lowering said yoke-frame,a yokepivoted upon said yoke-frame, means for automatically oscillating theyoke upon said yoke-frame, and a cutter-cylinder mounted in said yoke,substantially as and for the purpose set forth.

2. The combination in a chair-seat-surfacing machine, of a frame, asliding table mounted thereon, rack-and-gear mechanism for operatingsaid table, a yoke-frame above said sliding table, cams at the sides ofthe machine upon which the yoke-frame rests and which operate to raiseand lower it, a yoke pivoted' to said yoke-frame, a cam at one side ofthe machine-frame which operates to oscillate said yoke upon theyoke-frame, a cutter-cylinder mounted in said yoke, and gearingconnecting the table-moving gear and the camshaft, substantially as andfor the purpose set forth.

3. The combination in a chair-seat-surfacing machine, ofa frame, asliding table mounted thereon, clamp mechanism for securing chair-seatsthereto, rack-and-gear mechanism for operating said table, a yoke-framemount-- ed upon arms pivoted to the machine-frame, cams at the sides ofthe table for raising and lowering said yoke-frame, a yoke pivoted tosaid yoke-frame at one side of the center thereof, a cam at one side ofthe machineframe operating to raise and lower one end of said yoke so asto oscillate it upon the yokeframe, a cutter-cylinder mounted in saidyoke, and gearing connecting the table-moving mechanism, and thecam-moving mechanism, substantially as and for the purpose set forth.

In testimony whereof I affix my signature in presence of two Witnesses.

CHARLES A. STARK.

Witnesses:

G. J. WARDEN, E. B. LANDSRATH.

